Susan has $25. She is going to spend $4 on a book, then $3 per day on lunch. a) Write an equation that represents the following question: “How many days can Susan buy lunch with this plan?” b) Solve your equation, and check your solution.
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Answer: 7 days
Explanation: Susan has $25, if she spends $4 (subtract 25 and 4) to buy a book she gets $21, if she plans on spending $3 on lunch per day (divide 21 and 3), she has 7 days to buy lunch with this plan.
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